Alternator???or something else?
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Joined: Sep 2011
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From: SW Florida
Alternator???or something else?
My 01 Excursion with 7.3 has begun killing the batts lately. I hadn't driven it in a week or two and it was dead as a doornail. Charged batts and they cranked the truck but it was dead again 2 days later. Checked water and both batteries were a bit low-filled and charged but dead again the next afternoon. Ah well the batts are OLD so I took them to local Bbatteries Plus and kid there "checked" them and diagnosed them as dead. 2 new batteries abd $250 later the same problem. I start to diagnosing and find I have a 5+ amp draw!! Track it down to the alternator fuse under the hood in the fuse box. I checked all the fuses inside the cab as well just to rule anything else easy! The alternator is actually warm to the touch! This is no key in the truck and doors closed, all lights off. My Ex has right at 200K and alt looks to be original and I will likely replace with Motorcraft OEM new not reman, since I've not had any luck with discount parts houses' electrical parts. Just to be sure its the alternator, can anyone tell me which wire in the alt harness I should check to ensure something else isn't causing it to try to energize-or whatever the term is?
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Cole Neese
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
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Feb 22, 2014 11:40 PM
